公开(公告)号：US11422027B1

公开(公告)日：2022-08-23

申请号：US17177024

申请日：2021-02-16

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Yuan Yuan ,  Thomas Van Vaerenbergh ,  Bassem Tossoun ,  Di Liang

IPC: G01J1/44 ,  G02F1/35 ,  H01L45/00 ,  G01D5/16

Abstract: An apparatus includes a photodetector and a memristor coupled to the photodetector. The photodetector is configured to receive and convert optical signals to electrical signals to program the memristor to an on or off state. The apparatus further includes a ring resonator coupled to the memristor and configured to modulate light based on the on or off state of the memristor.

公开(公告)号：US11200929B1

公开(公告)日：2021-12-14

申请号：US16905694

申请日：2020-06-18

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Thomas Van Vaerenbergh ,  Can Li ,  Catherine Graves

IPC: G11C7/22 ,  G11C7/10 ,  G11C15/04 ,  G11C13/04 ,  G11C11/42

Abstract: Systems and methods for an optical ternary content addressable memory (TCAM) are provided. The optical TCAM implements a time-division multiplexing (TDM) based encoding scheme to encode each bit position of a search word in the time domain. Each bit position is associated with at least two time slots. The encoded optical signal comprising the search word is routed through one or more modulators configured to represent a respective TCAM stored word. If a mismatch between at least one bit position of the search word and at least one TCAM stored word occurs, a photodetector or photodetector array will detect light.

公开(公告)号：US10461853B1

公开(公告)日：2019-10-29

申请号：US16210388

申请日：2018-12-05

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Nikolas A. Tezak ,  David Kielpinski ,  Jason Pelc ,  Thomas Van Vaerenbergh ,  Ranojoy Bose ,  Raymond G. Beausoleil

IPC: H04B10/079 ,  G02B6/293 ,  H04B10/80 ,  G11C13/04

Abstract: In example implementations, an optical gate is provided. The optical gate receives at least one optical signal via a waveguide of an optical memory gate. The optical gate compares a wavelength of the at least one optical signal to a resonant wavelength associated with a resonator. When the wavelength of the at least one optical signal matches the resonant wavelength, a value that is stored in the resonator is read out via the at least one optical signal. Then, the at least one optical signal with the value that is read out is transmitted out of the optical gate.

公开(公告)号：US20170317745A1

公开(公告)日：2017-11-02

申请号：US15139971

申请日：2016-04-27

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Nikolas A. Tezak ,  David Kielpinski ,  Jason Pelc ,  Thomas Van Vaerenbergh ,  Ranojoy Bose ,  Raymond G. Beausoleil

IPC: H04B10/079 ,  G02B6/293 ,  G11C13/04 ,  H04B10/80

CPC classification number: H04B10/07955 ,  G02B6/29335 ,  G02B6/29338 ,  G11C13/048 ,  H04B10/80

Abstract: In example implementations, an optical gate is provided. The optical gate receives at least one optical signal via a waveguide of an optical memory gate. The optical gate compares a wavelength of the at least one optical signal to a resonant wavelength associated with a resonator. When the wavelength of the at least one optical signal matches the resonant wavelength, a value that is stored in the resonator is read out via the at least one optical signal. Then, the at least one optical signal with the value that is read out is transmitted out of the optical gate.

公开(公告)号：US11783878B2

公开(公告)日：2023-10-10

申请号：US17453585

申请日：2021-11-04

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Thomas Van Vaerenbergh ,  Can Li ,  Catherine Graves

IPC: G11C7/22 ,  G11C7/10 ,  G11C15/04 ,  G11C13/04 ,  G11C11/42

CPC classification number: G11C7/222 ,  G11C7/1012 ,  G11C7/1054 ,  G11C7/1081 ,  G11C11/42 ,  G11C13/04 ,  G11C15/04

Abstract: Systems and methods for an optical ternary content addressable memory (TCAM) are provided. The optical TCAM implements a time-division multiplexing (TDM) based encoding scheme to encode each bit position of a search word in the time domain. Each bit position is associated with at least two time slots. The encoded optical signal comprising the search word is routed through one or more modulators configured to represent a respective TCAM stored word. If a mismatch between at least one bit position of the search word and at least one TCAM stored word occurs, a photodetector or photodetector array will detect light.

公开(公告)号：US11580411B2

公开(公告)日：2023-02-14

申请号：US16224145

申请日：2018-12-18

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Suhas Kumar ,  Thomas Van Vaerenbergh ,  John Paul Strachan

IPC: G06N3/10 ,  G06N3/06 ,  G11C13/00

Abstract: Systems are provided for implementing a hardware accelerator. The hardware accelerator emulate a stochastic neural network, and includes a first memristor crossbar array, and a second memristor crossbar array. The first memristor crossbar array can be programmed to calculate node values of the neural network. The nodes values can be calculated in accordance with rules to reduce an energy function associated with the neural network. The second memristor crossbar array is coupled to the first memristor crossbar array and programmed to introduce noise signals into the neural network. The noise signals can be introduced such that the energy function associated with the neural network converges towards a global minimum and modifies the calculated node values.

公开(公告)号：US20220059147A1

公开(公告)日：2022-02-24

申请号：US17453585

申请日：2021-11-04

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Thomas Van Vaerenbergh ,  Can Li ,  Cat Graves

IPC: G11C7/22 ,  G11C13/04 ,  G11C7/10 ,  G11C15/04 ,  G11C11/42

Abstract: Systems and methods for an optical ternary content addressable memory (TCAM) are provided. The optical TCAM implements a time-division multiplexing (TDM) based encoding scheme to encode each bit position of a search word in the time domain. Each bit position is associated with at least two time slots. The encoded optical signal comprising the search word is routed through one or more modulators configured to represent a respective TCAM stored word. If a mismatch between at least one bit position of the search word and at least one TCAM stored word occurs, a photodetector or photodetector array will detect light.

公开(公告)号：US11086966B2

公开(公告)日：2021-08-10

申请号：US15757043

申请日：2015-09-08

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Jason Pelc ,  Thomas Van Vaerenbergh ,  Raymond G Beausoleil

IPC: G06F17/16 ,  G06N3/04 ,  G06N3/067 ,  G06N10/00 ,  G06N5/00

Abstract: In example implementations, an apparatus includes a plurality of nodes, a pump coupled to the plurality of nodes and a connection network. In one example, each one of the plurality of nodes may store a value. The pump provides energy to the each one of the plurality of nodes. The connection network may include a two dimensional array of elements, wherein each group of the two dimensional array of elements is in communication with a respective one of the plurality of nodes, wherein the connection network may be tuned with parameters associated with encoding of an Ising problem. The connection network may process the value stored in each one of the plurality of nodes. The Ising problem may be solved by the value stored in each one of the plurality of nodes at a minimum energy level.

公开(公告)号：US20200350991A1

公开(公告)日：2020-11-05

申请号：US16399176

申请日：2019-04-30

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Thomas Van Vaerenbergh ,  Raymond G. Beausoleil ,  Kevin B. Leigh ,  Di Liang ,  Terrel Morris ,  Paolo Faraboschi

IPC: H04B10/25 ,  H04J14/02 ,  G02B6/42 ,  G02F1/01 ,  H04B10/50 ,  H04B10/66

Abstract: Examples herein relate to optical systems. In particular, implementations herein relate to an optical system including a bidirectional optical link such as an optical fiber. The optical system includes first and second optical modules coupled to opposing ends of the optical fiber. The first optical module is configured to transmit optical signals across the optical fiber in a first direction and the second optical module is configured to transmit optical signals across the optical fiber in a second direction opposite the first direction. Each of the first and second optical modules includes a multi-wavelength optical source configured to emit light. Respective channel spacing of the multi-wavelength optical sources of the first and second optical modules are offset from each other such that the respective wavelengths of the emitted light transmitted across the optical fiber from the first and second optical sources do not overlap.

公开(公告)号：US20200341200A1

公开(公告)日：2020-10-29

申请号：US16397689

申请日：2019-04-29

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Thomas Van Vaerenbergh ,  Peng Sun ,  Sagi Varghese Mathai

IPC: G02B6/34 ,  G02B6/122

Abstract: Examples herein relate to multi-layer grating couplers. In particular, implementations herein relate to multi-layer grating couplers that include a first grating layer, an angle correction layer disposed over the first grating layer, and an oxide layer disposed between the first grating layer and the angle correction layer. The multi-layer grating coupler further includes a waveguide layer disposed at a same elevation as or below the first grating layer. The first grating layer is configured to convert a propagation direction of light from an in-plane direction through the waveguide layer to a near-vertical or non-in-plane direction into the angle correction layer. The angle correction layer is configured to tilt an output coupling angle of the light from the first grating layer such that the light exits the multi-layer grating coupler into an optical fiber at a same angle as the optical fiber.